The correct answer is: A. NH 133B
NH 133B is a national highway in India. It is a spur road of National Highway 33. It starts at Ranchi and ends at Daltonganj. It is 122.2Â km long.
NH 33 is a national highway in India. It runs from Varanasi in Uttar Pradesh to Silchar in Assam. It is 1,408Â km long.
NH 20 is a national highway in India. It runs from Agra in Uttar Pradesh to Kanyakumari in Tamil Nadu. It is 2,465Â km long.
NH 143H is a national highway in India. It runs from Ranchi in Jharkhand to Jamshedpur in Jharkhand. It is 189Â km long.
Therefore, NH 133B is the smallest national highway in Jharkhand.